# Klax Teacher vs ProtAct17

The clearest difference is update cadence: Klax Teacher at every 2 months against ProtAct17's every 9 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Klax Teacher ships an update every 2 months, ProtAct17 every 9 months. The most recent releases landed on November 2, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Klax Teacher | ProtAct17 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 9 months |
| Size | 17 MB | 187 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Klax Kreativ UG (haftungsbeschraenkt)](https://appshunter.io/developer/1137018536) | [KIDS interactive GmbH](https://appshunter.io/developer/731500021) |

## What reviewers say

### Klax Teacher

[App page](https://appshunter.io/ios/app/klax-teacher/id1080265154)

**Features:** macOS Compatibility

**In-app purchases:** none


### ProtAct17

[App page](https://appshunter.io/ios/app/protact17/id6446908812)

**In-app purchases:** none


## Frequently asked questions

### Is Klax Teacher free?

Klax Teacher is free to download, with no in-app purchases.

### Is ProtAct17 free?

ProtAct17 is free to download, with no in-app purchases.

### Do Klax Teacher or ProtAct17 have ads?

Neither Klax Teacher nor ProtAct17 shows ads.

### Which is updated more often, Klax Teacher or ProtAct17?

Klax Teacher ships an update every 2 months, and ProtAct17 every 9 months. Most recently, Klax Teacher was updated on November 2, 2026 and ProtAct17 on October 27, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*